1 package org.apache.turbine.util.validation;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57
58 /***
59 * @author <a href="mailto:mikeh@ncsa.uiuc.edu">Mike Haberman</a>
60 * @version $Id: EmailValidator.java,v 1.1.1.1 2001/08/16 05:10:04 jvanzyl Exp $
61 *
62 *
63 */
64 public class EmailValidator extends InputValidator
65 {
66 /***
67 * default Constructor,
68 */
69 public EmailValidator()
70 {
71 super(false, NoMaxSize, EmptyArgv);
72 }
73
74 /***
75 * @param String input, input to be checked
76 */
77 protected void check(String input)
78 throws Exception
79 {
80 // the only two checks:
81 // 1. @ must be present
82 // 2. must end in '.extension'
83
84 int idx = input.indexOf("@");
85 if (idx == -1)
86 {
87 throw new Exception("Missing @");
88 }
89
90 idx = input.lastIndexOf(".");
91 if (idx == -1)
92 {
93 throw new Exception("Missing .{top level domain} suffix");
94 }
95
96 String domain = input.substring(idx);
97 if (domain.length() < 3)
98 {
99 throw new Exception("Invalid .{top level domain} suffix");
100 }
101 }
102
103 /***
104 * @return String, the expected format of the input
105 */
106 public String getExpectedFormat()
107 {
108 return "name@domain.topLevelDomain";
109 }
110 }
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